I have found the Gualandi 20GA wad was ideal for the 16/20 Lemke load using the Remington black 16Ga hulls. These Remington black hulls seem a bit undersize and have been a plu-perfect b*tch trying to reload using 16Ga wads. I read about this 16/20 Lemke load, and fell in a bucket and came up smelling like a rose reloading with this Gualandi 20Ga wad in the 16/20 Lemke load.
Very satisfied with this load the few times I've been using my 16GA shotguns.